Question

Find the value of 2 sin ² 45 - 5 tan 45

a) -1
b) 1
c) -4
d) 3




In rhombus ABCD, if angle ACB = 40 degree, then find angle ADB.

a) 50 degree
b) 45 degree
c) 60 degree
d) 75 degree​

Answer 1

Answer:

1) -4

2) 50°

Step-by-step explanation:

$2 \times \frac{1}{2} - 5 \times 1 \\ 1 - 5 \\ - 4$

Tan 45° = 1

Sin 45° = 1/√2

Answer 1 C ) -4

2) LACB = L DAC ( Alternative angles)

40° = L DAC

L ADB = 180 - 130 ( Sum of triangle )

= 50°

2) a) 50°