Question

Solve the questions ASAP .....

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no irrelevant answers plsss​

Answer 1

We know that ,

• Cos(90 + Φ) = -Sin(Φ)
• Tan((360 × n) - Φ) = Tan(Φ)
• Sec(360 + Φ) = Sec(Φ)
• Sec(90 + Φ) = -Cosec(Φ)
• Cot((360 × n) - Φ) = -Cot(Φ)

$\mathtt{\large \fbox{Degree \: measure = \frac{180}{\pi} \times radian \: measure }}$

Thus ,

i)

➡Cos(180)

➡Cos(90 + 90)

➡-Sin(90)

➡-1

ii)

➡Tan(690)

➡Tan(360 × 2 - 30)

➡-Tan(30)

➡-1/√3

iii)

➡Sec(360 + 135)

➡Sec(135)

➡Sec(90 + 45)

➡-Cosec(45)

➡-√2

iv)

➡Cot(11π/3)

➡Cot(660)

➡Cot(360 × 2 - 60)

➡-Cot(60)

➡-1/√3