Math, asked by pratikraundale12, 5 months ago

sinnθ=-4/5 then find cos2θ​

Answers

Answered by danish4711
1

Answer:

as sin theta Is given draw a triangle and mark the a angle theta and mark side opposite to theta is 4 and hypotenuse is 5 then you can easily find the other sides and you can get cos2 theta

or directly apply the formula

cos 2 theta = 1 - 2 sin square theta

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