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\(\cos2A=2\cos A\sin A\)
Find the value of sinA using
\(\sin A=\sqrt{1-\cos^2A}\).
Can u do nw?

So 2(-0.28)(0.276)

:/ It's not matching up

Find them in the fraction form. Vat do u get for sinA?

69/250

U r welcome.:)

hyp^2=base^+perp^2
25^2=-7^2+perp^2
625=49+perp^2
625-49=perp^2
576=perp^2
24=perp

thanks! you are always welcome friend.

I agree vth u @muhammad9t5. Ur method is easy.

yup. @ajprincess please fan me.

I fanned u. i fan all those who fan me.:)