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RadEnBest ResponseYou've already chosen the best response.0
then use the formula : cos(AB) = cosAcosB + sinAsinB
 one year ago

RadEnBest ResponseYou've already chosen the best response.0
here given A=45 and B=30 degrees
 one year ago

mitchelsewbaranBest ResponseYou've already chosen the best response.0
cos 45cos30 +sin45cos30?
 one year ago

RadEnBest ResponseYou've already chosen the best response.0
45 and 30 are the special angles.. u have to remember the values of sin and cos for angles 30 and 45 degrees
 one year ago

mitchelsewbaranBest ResponseYou've already chosen the best response.0
ok. how do i solve from here?
 one year ago

RadEnBest ResponseYou've already chosen the best response.0
u just put the values of them (sin45, sin 30, cos45, cos 30)
 one year ago

RadEnBest ResponseYou've already chosen the best response.0
cos 45cos30 +sin45cos30 = ... (calculate it and simply)
 one year ago

RadEnBest ResponseYou've already chosen the best response.0
hmm.. what identity did u use ? it should be : cos 45cos30 +sin45cos30 do u know the exactly value of sin30 ? sin45 ? cos30 ? cos45 ?
 one year ago

miley28Best ResponseYou've already chosen the best response.0
just put the values cos45 =1/root 2 and cos 30= root3/2
 one year ago

miley28Best ResponseYou've already chosen the best response.0
sin 45=1/root ovr2 and sin 30=1/2...the multiply and add
 one year ago

mitchelsewbaranBest ResponseYou've already chosen the best response.0
1/root ovr2 or 1/ root 2?
 one year ago
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