CBSE BOARD XII, asked by soumya1944, 11 months ago

7 formulas of trigonometry​

Answers

Answered by Anonymous
12

Answer:

There are many different kind of identities in Trigo.

A}

1) sinθ÷cosθ = tanθ

2) sin²θ + cos²θ = 1

3) 1 + tan²θ = sec²θ

4) 1 = cot²θ = cosec²θ

B}

1) sin  ( 90 - θ ) = cos∅

2) cos ( 90 - θ ) = sin

3) sin ( 180 - θ ) = sinθ

4) cos ( 180 - θ ) = cosθ

C}

1) sin²θ = 1 - cos2θ ÷ 2

2) cos²θ = 1 + cos2θ ÷ 2

tan²θ = 1 - cos2θ ÷ 1 + cos2θ

Additional Information:

Trigonometric Identities of specific angles.

θ              0°             30°            45°              60°             90°

sin           0               1/2           1 /√2          √3/2              1

cos          1             √3/2          1/√2             1/2                0                                          

tan          0             1/√3             1                √3                 ∞                                        

cot          ∞            √3                1                1/√3               0                                

sec          1            2/√3           √2                2                   ∞                                                        

cosec     ∞            2                √2              2/√3                1

This table will really help you in memorisng your specific angles which are generally asked in an examination.

Answered by psupriya789
4

Answer:

HOPE IT HELPS U

MARK AS BRIANLIEST

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