Question

sin^-1 (3/5)+cos^-1 (12/13)=sin^-1(56/65) ​

Answer 1

Answer:

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Step-by-step explanation:

hello mate

for refrigerator

convert 400 w into Kw by dividing it by thousand.

4000/1000 = .4 Kw

energy consumed in the 30days = .4 * 8 * 30 = 96 KwH

for iron

convert 750 w into Kw by dividing it by thousand.

750/1000 = 3/4 Kw

energy consumed in the 30days = 3/4 * 2 * 30 = 45 KwH

total energy consumed = 96+45 = 141

cost of 1kwh = 3rs

so 141 kwh = 3 × 141 = 423rs

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