1.

Plzz oslve this question of trigonometry​

Answer»

Answer:

0.51

Step-by-step EXPLANATION:

this can be changed into a quadratic EQUATION in sinФ.

write cos²Ф = 1 - sin²Ф

final quadratic equation will be = 2sin²Ф+4sinФ-5

sinФ=0.87

using the VALUE of sinФ we can find the value of other trigonometric FUCTION.



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